We use dental model resin for our moulds. We cast SMOOTHON SORTA CLEAR 40, 18 (12 to follow). We also cast SMOOTHSIL 950 and 960, ECOFLEX 00-50 (00-30 to follow) and BLUESIL RTV 147 A+B
Where the silicone is in contact with the mould, the mould wall thickness is between 0.3 and 0.4mm
We wash in clean IPA every time 5 mins wash followed by 5 mins rinse using manual agitation and jetting using a syringe.
We follow this by drying at 40 deg C (fan assisted) for 35 mins.
Finally UV cure under glycerine for 40 mins
When demolding, we do get some mechanical bonding between the mould and the silicone, bit with gentle teasing it comes out whole and we have no problems. We never have a problem with uncured silicone.
Just a note, but I am sure you have this covered, Do not use latex gloves when using platinum cure silicone. It interferes with the curing process.
We are looking to use CLEAR and DENTAL SG in the future so if any one has experience of these please shout out. We use the DENTAL MODEL because of the high quality of print output.